Monoflange Valve

At YDB valves, we design monoflange valves to replace conventional multi-valves installations. All our monoflange valves are produced in accordance with the highest standards.

Monoflange Valves

YDB monoflange valves are designed to be directly installed on the process equipment. The monoflange valve can either be directly attached with pressure instrumentation where there’s an ANSI/ASME flange or it can be sandwiched between various equipments as per the design requirements.

The design of the YDB monoflange valves is such that it reduces the number of potential leak paths to make your system more safe and compact. Monoflange valves will allow you to achieve significant weight reduction in the system and cost savings. Most operators prefer monoflange over traditional double block and bleed valves as it gives them weight and space advantages.

YDB monoflange valves are available in single block, block and bleed, block bleed block, and block block bleed. All YDB monoflange valves are factory tested.

Our monoflange valves range from process to instrument valves.

Process Monoflange

Process monoflanges replace the traditional isolation valve and are closely coupled to the process piping flange to connect process with instruments. Many markets have benefited from process monoflanges as they combine instrument and piping valves in a single unit. The standard connections for process monoflange are provided in accordance with the ASME B16.5.

Instrument Monoflange

Coupling of instrument monoflanges to a pre-installed isolation valve provides a compact instrument double block and bleed valve. The standard connections for instrument monoflange are provided in accordance with the ASME B16.5.

Applications :

Monoflange valves are used in upstream onshore/offshore oil and gas production. They’re also used with gauge pressure instruments to minimize the weight and size of the pipe and valve assemblies used for vent, calibration and primary or/and secondary isolation.

The highly sophisticated design features of monoflange valves make them suitable for several other applications as well. These include:

• Isolation service
• Level measurement
• Chemical injection
• Sampling
• Pressure measurement
• Process to instrument interface
• Chemical seal
• Flushing connections
• Drains for pipes and tanks
• Corrosive pressure media
• Industrial process plants

Benefits of Monoflange Valves

• The one piece body of monoflange reduces the number of potential leak points.
• Monoflange valves enable a compact and optimal measuring point assembly.
• Size and weight of the installation is significantly reduced
• Reduces vibrations in the system
• Ensures structural integrity of the system

Design Range

Pressure Class

YDB monoflanger valves can handle pressure up to 10,000 psi (690 bar)

150 to 2500 flange class

Monoflange Valves Catalogue

We offer several configurations in our monoflange valves. Our monoflange valve product range includes:

• Single Block Monoflange Valve
• Block and Bleed Monoflange Valve
• Block and Block Monofalnge Valve
• Block Bleed Block Monoflange Valve

Block Block Bleed Monoflange Valve

Monoflange Valve

Features :

• Compact Block, Block and Bleed assemblies with minimal potential leak points.
• Compatible with ASME B16.5 Flange Connections from 1/2 inch to 2 inch (DN 15 to DN 50).
• ANSI B16.5 150 to 2500 flange class and API 10000. Combined needle and OS&Y valves available.
• Raised face and ring type joint flange face styles.
• One piece forged construction flange as standard
• 4mm Needle valve orifice standard and for bigger orifice please contact us.
• Anti-blow out valve stem.
• Fire safe designed to meet BS 6755 part 2/API 607 NACE MR 0175/ISO 15156 compliant material available.
• Standard material of construction: SS316, SS316L, Carbon steel, A105, Duplex.
• Optional material: Super Duplex, Inconel, Hastelloy, 6Mo, Monel.

Ordering Information :

MFV - Monoflange Valve

MFV05 Series -Single Block

• Flange to 1/2" NPTF
• Isolate : OS&Y or Needle

MFV10 Series - Block & Bleed

• Flange to 1/2" NPTF
• Isolate : OS&Y or Needle
• Bleed : OS&Y or Needle

MFV15 Series - Block & Block

• Flange to 1/2" NPTF
• Primary Isolate : OS&Y or Needle
• Secondary Isolate : Needle

MFV20 Series - Block Bleed Block

• Flange to 1/2" NPTF
• Primary Isolate : OS&Y or Needle
• Bleed : Needle
• Secondary Isolate : OS&Y or Needle

MFV25 Series - Block Block Bleed

• Flange to 1/2" NPTF
• Primary Isolate : OS&Y or Needle
• Bleed : Needle
• Secondary Isolate : OS&Y or Needle

A. Process Connection Size

B. Class Rating

C. Process Connection Type

• A - Flange, RF Smooth
• B - Flange, Concentric Serrated
• C - Flange, RTJ

D. Outlet Connection

• 8N - 1/2 Female NPT
• 12N - 3/4 Female NPT
• F - Flange

E - Body Material

• S - SS316
• C - Carbon Steel
• D - Duplex
• M - Monel
• I - Inconel

F - Trim Material

• S - SS316
• C - Carbon Steel
• D - Duplex
• M - Monel
• I - Inconel

G - Packing Material

• P - PTFE
• G - Graphite
• RP - Reinforced PTFE
• F - Flange (Same as Process)

H - Vent

• 1/4 Female NPT - 4
• 1/2 Female NPT - 8

I- Trim type

MONOFLANGE SINGLE BLOCK - MFV05 SERIES

MFV05-SERIES

MONOFLANGE SINGLE BLOCK & BLEEED - MFV10 SERIES

MFV10-SERIES

MONOFLANGE DOUBLE BLOCK - MFV15 SERIES

MFV15-SERIES

MONOFLANGE BLOCK BLEED BLOCK - MFV20 SERIES

MFV20--SERIES

MONOFLANGE BLOCK BLEED BLOCK - MFV20 SERIES

MFV25--SERIES